Electric cooking-stove.



PATENTED JUNE 4, 1907.

D. 0. SMITH.

ELEGTRIG 000mm s'ruvn.

APPLICATION FILED AUG. 11.1906.

a u M r w UNITED STATES PATENT OFFICE.

ELECTRIC COOKING STOVE.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed August 11,1906. Serial No. 330,248.

To all whom it may concern:

Be it known that I, DAVID CURLE SMITH, a subject of King Edward VII, and a citizen of the Commonwealth of Australia, residing at Kalgoorlie, Western Australia, Australia, have invented certain new and useful Improvements in Electric Cooking-Stoves, of which the following is a specification.

The ob'ect of thisinvention is to produce a domestic stove for cooking by electricity and in the construction of the same I preferably employ three compartments, that is for roasting, grilling and boiling respectively, and place thefone directly above the other, the roasting compartment being lowest and the boiling division at the top of the stove.

The chief essential feature in the construction of the stove consists in having no metallic contact or agent between the inner and outer walls of the body frame of the stove, said walls further having no conductor whose terminals are exposed either to the inner heat or outer atmosphere, with the result that the loss or leakage of heat is reduced to a minimum as no means exist between such walls for the conductivit of such current or heat away from the heatmg coils or stove.

The second essential feature of the stove is in the use of naked or exposed heating coils which are adapted to freely expand or contract in contra-distinction to embedding or clothing them in enamel, plaster of paris or such like.

The third main feature is the provision for insulatin the walls of the stove body by means 0 non-combustible, non-conducting material so as to prevent loss of heat by radiation or otherwise.

The general construction and use of the stove will now be explained with the aid of the attached drawings in which:-

Figure 1 is a front view with the door removed while, 2 is a view with one end of the stove removed. v

The body frame of the stove is preferably made of thin sheet metal and of a jacketed form having the hollow walls as a and b,the intervening space being filled with mineral wool a, asbestos or such like non-conducting material, so as to prevent loss of heat away from the stove chamber. The inner walls as b may be made of glazed earthenware, uralite or similar non-conducting substance. The

stove is provided with a hinged lid or lids as c and also with a jacketed door as c filled with asbestos, while suitable Wood frames as c are employed, said framing being coated with so uble glass for insulatlon purposes.

Referring to the roasting compartment, the trays as d are held on the guides or runners d and are directly heated by the naked electric spirals e which may be if required coiled on an earthenware core or insulator. These coils are wound closely together at their ends so as to insure a good electric contact. Suitable contact clips and nuts as 6 support these coils, which are mounted as shown on an insulated removable pad as e and provided with a switch as e for the regulation of the heat. This pad 0 may be withdrawn for purpose of renewing or repairing the coils e. As aroof or dome for the roasting com artment I employ a divisional pad as f fil ed with insulating material as f. -This pad is removable so that the heat from the upper coils may be concentrated 01' deflected onto the roasting compartment.

The griller or toaster as g is made in the form of a withdrawal box tray having an insulated front wall as g and a grid bottom as g on which as say the chops are laced for cooking. The griller receives its eat from top and bottom coils as g and g which are mounted on a suspension wire frame as 9 said coils are controlled by switches g" for the regulation of heat. These frames 9 may be withdrawn for purposes of renewal or repair. The lower coils g are provided with non-contact hoods 9 so as to protect the coils from the falling grease while a suitable grease tray g is placed beneath them. Above the griller I place a grating of wire gauze as h supported by suitable stays and on this grating is laced a removable insulated pad made with holes as h. This pad receives and holds the boiling utensil as h which sits on the circulardframe 7L3 secured in the open center of the a p The inner walls as b may be reinforced by being riveted to metal strips or bands having sheets of asbestos interposed between such walls and strips to minimize the amount of heat which would otherwise be conducted away from the stove chamber or shell and so arranged that no metallic contact exists between such walls a or b.

ICC

What I claim and desire to secure by Letrial between them, a removable insulated pad it having holes therein and supported at the upper part of the stove; said holes being adapted to receive ajreceptacle, removable insulated pads sliding in said side openings, heatin coils carried by said pads and a removable insulated division pad.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

' DAVID OURLE SMITH. Witnesses:

F. 0. Common, TOM HOLLINS. 

